/*
 * Copyright 2020 The Backstage Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import '@testing-library/jest-dom';

const { EventSourcePolyfill } = jest.requireMock('event-source-polyfill');
global.EventSource = EventSourcePolyfill;

// Patch jsdom to add feature used by CodeMirror
document.createRange = () => {
  const range = new Range();

  range.getClientRects = () => ({
    item: () => null,
    length: 0,
    [Symbol.iterator]: jest.fn(),
  });

  return range;
};
